Gasoline lantern



March 25, 1952 Filed Oct. 29, 1947 J. L. CAHILL 2,590,434

GASOLINE LANTERN 2 SHEETS-SHEET l 5 IN VEN TOR.

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March 25,- 1952 J. L. CAHILL 2,590,434

GASOLINE LANTERN Filed, Oct. '29, 1947 2 SHEETS-SHEET 2 INVEN TOR.

Jofin Lewd! Patented Mar. 25, 1952 UNITED STATES PATENT OFFICE GASOLINE LANTERN John Lewis Cahill, New Albany, Ind.

Application October 29, 1947, Serial No. 782,940

2 Claims. (01. 67-50) (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) l The invention described herein, if patented, may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to gasoline lamps or lanterns of the pressure type and has for one of its objects to construct the lantern in such manner as to provide a substantially clear path for the emission of the light rays throughout its full circumference, thereby eliminating any blind spots in the lighted area.

Another object of the invention consists in the provision of a gasoline lamp having means for removing excess heat but retaining sufficient heat to maintain the desired vapor pressure in the fuel tank.

A still further object of the invention resides in the provision of a gasoline lamp having highly efficient means for effecting and maintaining the vaporization of the fuel up tothe time it enters the gas mantle.

Other objects and advantages of the invention will be in part apparent and in part pointed out in the following description taken in connection with the accompanying drawings, in Which,

Figure 1 isa vertical sectional view through the complete lamp and support;

Figure 2 is an enlarged fragmentary detailed view of one of the clips for supporting the globe;

Figure 3 is a side elevational view of the lamp;

Figure 4 is a plan view thereof with parts removed; and

Figure 5 is an elevational view, partly in section, of the flow control means for the gasoline.

As indicated above, one phase of the invention relates to the elimination of blind spots in the light emanating from the lamp and this is accomplished in part by the structure of the lamp itself and in part by the support for the lamp. This latter comprises a wire frame composed of a ring member I adapted to be based upon a table or the like and a plurality of uprights 2 having their upper ends secured to the lower edge of the body chimney or member 3 of the lamp, as indicated by reference numeral 4.

Releasably secured to the lower edge of the chimney 3 is a cylindrical glass globe 5 closed at its lower end by an integral glass plate 6 provided with perforations 1 Which permit the access of air to the burner within the globe. The securing means for the globe consists of clips 8 fixed to the inner surface of the chimney and which are adapted to spring over the bead formed on the upper edge of the open end of the globe.

Surrounding the mid-portion of the chimney 3 is an annular fuel tank or reservoir 9 the inner wall of which is of substantially greater diameter than the diameter of the chimney thereby providing an annular passageway or flue for the ascending air to aid in preventing the temperature of the reservoir from being raised unduly. The reservoir is supported in spaced relationship to the chimney 3 by a plurality of brackets Ill which may be welded or otherwise connected to the inner wall of the reservoir and be detachably supported on the chimney by offset portions l l which are received in clips l2 mounted exteriorally of the body member. Within the chimney of the lamp, about midway of its height, are a plurality of inwardly directed arms [3 which form a support for a yoke l4 which in turn supports a manifold block or mixing chamber l5. Downwardly directed arcuate pipes 16 have their upper ends in communication with the interior of the mixing chamber l5 and their lower ends I! open downwardly into the globe 5 to receive air entering the globe through the perforations 'l in the bottom thereof. Also communicating with the interior of the mixing chamber I5 is a pipe or conduit l8 for carburized air, to the lower end of which is connected a conventional gas mantle l9.

The yoke I4 is connected to the arms l3 by means of a screw 20 and this screw may also be threaded into a rod 2| which extends upwardly beyond the top of the body member 3. Mounted on the upper end of the chimney 3 is a ventilating cap comprising a sleeve 22 provided with a plurality of perforations 23 and a disc portion 24 provided with a central opening through which the upper end of the rod 2| extends. This upper end of the rod 2| is threaded and receives a nut 25 which serves to clamp the ventilated cap onto the top of the chimney.

The upper wall of the reservoir is provided with a filling opening 26 in which is normally mounted a pump 2'! for providing the necessary pressure upon the upper surface of the fuel, the maximum level of which is indicated by the numeral 28. Diametrically opposite the pump 2'! is a valve mechanism for controlling the flow of the fuel from the tank and indicated generally by the numeral 30. This mechanism is of conventional design and includes a tubular member 3| extending downwardly to a point adjacent the bottom of the reservoir. The lower end of the tube 3| is provided with a cap 32 having a central aperture controlled by a needle valve 33 which is normally biased upwardly by a spring 34. The upper end of the needle valve 33 cooperates with a valve stem 35 having a conical end 33 adapted to cooperate with a valve seat 31 in the casing 38. The valve stem 35 is threadedly connected to the branch 39 of the casing and the valve 36 may be moved toward and from its seat by means of the operating knob 49. It will be obvious that if the knob 40 is turned slightly so as to move the valve member 36 to the right (Fig. the needle valve 33 will be allowed to rise and will be forced to do so by reason of its spring 34, thereby permitting a small amount of the fuel to travel up through the tube 3| and past the valve 36. If the knob 40 is turned further a greater amount of fuel will pass the point 36 thus controlling the flow of fuel to the burner.

Connected to the upper end of the valve casing 30 is a generator tube or pipe 4| which extends through an opening 42 into the interior of the chimney 3 of the lamp. From the opening 42 the pipe extends downwardly past the arms [3 to a point adjacent the gas mantle as indicated by the numeral 43 and thence upwardly as indicated by numeral 44 where it is connected to an openin in the upper end of the mixing chamber [5. This arrangement of the pipe 4| provides a relatively long passageway for the fuel to be vaporized and this vaporization of the fuel is further facilitated by reason of the loop 43 which brings the fuel quite close to the upper end of the burner 19.

On its exterior wall the annular reservoir 9 is provided with a pair of oppositely disposed bail ears 46 in which are pivotally mounted the free ends of the bail 46 by which the lamp may be transported from place to place.

In the operation of the device, it being assumed that the reservoir 9 is filled up to the fuel level indicated by the numeral 23 and the pump 21 operated to provide the necessary pressure upon the surface thereof, the valve 36 may be opened slightly by a quarter turn of the knob 49 thus permitting a small amount of fuel to pass through the pipe 4|, loop 43, and terminal 44 to the mixing chamber l5 where it is mixed with air entering from the pipes l6, and descends to the mantle 19. The fuel may be ignited by passing a lighted match up through one of the holes 6 in the globe 5 as indicated in dotted lines in Figure' 1. After the burner is ignited the valve 36 may be fully opened by further rotation of the operating knob 40 and the vaporization of the fuel is assured by its long passage through the pipe 4 |--43 and the proximity of the lower portion of the pipe to the burner itself. Pressure upon the upper surface of the fuel within the reservoir is maintained in great part by the heat from the lamp itself. Undue rise in temperature however is prevented by the current of cooling air passing upwardly between the inner wall of the reservoir 9 and the chimney 3 of the lamp.

By reason of the plurality of small openings 7 in the base of the globe 5 the necessity for a bafiie plate to guard the mantle 19 against incoming cold air is avoided and this feature, as well as the design of the supporting bracket [-2 contributes to the elimination of blind spots in the light emanating from the lamp.

While the preferred embodiment of the invention has been described in considerable detail it is obvious that various changes may be made in structural details without deviating from the spirit of the invention and it is intended that all such changes be included within the scope of the appended claims.

I claim:

1. A vapor lamp including a substantially cylindrical chimney portion, an annular tank of substantially cylindrical formation surrounding said chimney in heat-exchange relation thereto and extending throughout a substantial portion of thelength of the chimney whereby a continuous pressure is created Within the tank while the lamp continues in operation, a, hand pump on the tank for applying initial fluid pressure to the surface of fuel in the tank to initiate operation of the lamp, a mixing chamber mounted in the interior of the chimney, a conduit for carburized air communicating with the lower end of the mixing chamber and adapted to receive a gas mantle, a generator tube connecting the mixing chamber with the upper end of the tank in spaced relation to the pump, said tube provided with a loop portion positioned adjacent the gas mantle to receive heat therefrom to vaporize the fuel, and a second tube leading from the upper end of the generator tube to a point adjacent the bottom of the tank.

2. A vapor lamp including a substantially cylindrical chimney portion, an annular tank of substantially cylindrical formation surrounding said chimney in heat-exchange relation thereto and extending throughout a substantial portion of the length of the chimney whereby a continuous pressure is created within the tank while the lamp continues in operation, the inner wall of the tank being spaced slightly from the chimney wall to provide a vertically-extending flue for thev passage of cooling air, a hand pump on the tank for applying initial fluid pressure to the surface of fuel in the tank to initiate operation of the lamp, a, mixing chamber mounted in the interior of the chimney, a conduit for carburized air communicating with the lower end of the mixing chamber and adapted to receive a gas mantle, a generator tube connecting the mixing chamber with the upper end of the tank in spaced relation to the pump, said tube provided with a loop portion positioned adjacent the gas mantle to receive heat therefrom to vaporize the fuel, and a second tube leading from the upper end of the generator tube to a point adjacent the bottom of the tank.

JOHN LEWIS CAHILL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,146,352 Seligmann July 13, 1915 1,270,858 Nagel July 2, 1918 1,303,462 Coleman May 13, 1919 1,337,620 Raifel Apr. 20, 1920 1,496,420 Kohlhase June 3, 1924 2,362,342 Baker et al Nov. 7, 1944 FOREIGN PATENTS Number Country Date 214,916 Great Britain May 1, 1924 399,115 Great Britain Sept. 28, 1933 415,467 France July 13, 1910 582,112 Germany Aug. 9, 1933 606,612 Germany Dec. 6, 1934 

